完形填空。 Spend time in a bookshop can be enjoyable. If you go to a good shop, no __ 1 __ will come near to you and say, 'Can I help you?' You __ 2 __ buy anything you don't want. You may try to find out __ 3 __  the book you want is. But if you fail, the assistant will lead (引导) you there and then he will go away. It seems that he is not __ 4 __  in selling any books at all. There is a story which tells us about a good shop. A medical student __ 5 __  a very useful book in the shop, __ 6 __  it was too expensive for him to buy. He couldn't get it from the library, either. So every afternoon, he went there to read __ 7 __ at a time. One day, however, he couldn't find the __ 8 __  from its usual place and was leaving when he saw an assistant signing to him. To his surprise, the assistant __ 9 __  to the book in a corner, 'I put it there so as not to be __ 10 __ out.' said the assistant. Then he left the student go on with his reading. (     ) 1. A. assistant (     ) 2. A. won't (     ) 3. A. what (     ) 4. A. surprised (     ) 5. A. bought (     ) 6. A. but (     ) 7. A. little (     ) 8. A. book (     ) 9. A. went (     ) 10. A. sold B. waiter B. needn't B. which B. surprising B. found B. and B. a little B. shop B. used B. taken C. police C. mustn't C. where C. interesting C. read C. so C. few C. assistant C. pointed C. found D. teacher D. can't D. when D. interested D. took D. or D. a few D. shopkeeper D. left D. watched